Sound weird when playing on MC:W10 [Only IG, Not main screen/pause screen)

This bug is only for MC:W10 (I tested on my phone in the same world and I don't have this problem), so : When im on the main screen, the sound is ok, but in the world, the sound is weird.. There a little video to show you the bug : https://youtu.be/q6N02eWT2nY

(Remember : I tried on my phone [iPod 5 iOs 9.3.2] and it was correctly work)